2004 INFINITI QX56 belt

PRECAUTION
DI-3
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
PRECAUTION PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS007DI
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WA RN ING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Wiring Diagrams and Trouble Diagnosis EKS007DJ
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" .

Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .

Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" .

COMBINATION METERS
DI-13
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
Meter/Gauge Operation and Odo/Trip MeterEKS007DR
SELF-DIAGNOSIS FUNCTION
The following items can be checked during Combination Meter Self-Diagnosis Mode.

Gauge sweep and present gauge values.

Illuminates all odometer, fuel, and engine temperature segments.

Illuminates all micro controlled lamps/LED's regardless of switch configuration.

Displays estimated present battery voltage.

Displays seat belt buckle switch LH status.
HOW TO INITIATE COMBINATION METER SELF- DIAGNOSIS MODE
NOTE:
Once entered, Combination Meter Self-Diagnosis Mode will function with the ignition switch in ON or START.
Combination Meter Self-Diagnosis Mode will exit upon turning the ignition switch to OFF or ACC.
To initiate Combination Meter Self-Diagnosis Mode, refer to the following procedure.
1. Turn the ignition switch ON, while holding the odometer/trip meter switch for 5 - 8 seconds.
NOTE:
If the diagnosis function is activated the odometer/trip meter will display tESt.
COMBINATION METER SELF-DIAGNOSIS MODE FUNCTIONS
To interpret Combination Meter Self-Diagnosis Mode functions, refer to the following table.
Event Odometer Display Description of Test/Data Notes:
Odometer/trip meter A/B
switch held from 5 to 8
seconds (or until
released)tESt Initiating self-diagnosis mode
Odometer/trip meter A/B
switch engaged and
released = next test
requestedrXXXX, FAILReturn to normal opera-
tion of all lamps/LEDs and
displays hex ROM rev. If
a ROM checksum fault
exists, display alternates
between "r XXXX" and
"FAIL".
Next test requested nrXXXXDisplays hex ROM rev as
stored in NVM.
Next test requested GAGEPerforms sweep of all
gauges, then displays
present gauge values.
Performs checksum tests
on ROM and EE.Gauges sweep within 10 sec-
onds
Next test requested (All segments illuminated)Lights all odometer/trip
meter, fuel, and engine
temperature display seg-
ments.Initiating self-diagnosis mode
complete
Next test requested bulbIlluminates all micro-con-
trolled lamps/LEDs
regardless of SW configu-
ration.
Next test requested EE XX, FAILHex EE level. If EE
checksum fault exists,
display alternates
between "EE XX" and
"FAIL".
Next test requested dtXXXXHex coding of final manu-
facturing test date.

COMBINATION METERS
DI-15
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
Next test requested BAtXX.XEstimated present bat-
tery voltage.
Next test requested rES -XSeat belt buckle switch
LH status.1= Buckled
0 = Unbuckled
Next test requested PA -XX Hex value port A.
Next test requested Pb -XX Hex value port B.
Next test requested PE -XX Hex value port E.
Next test requested PL -XX Hex value port L.
Next test requested P6 -XX Hex value port K.
Next test requested Pn -XX Hex value port M.
Next test requested PP -XX Hex value port P.
Next test requested PS -XX Hex value port S.
Next test requested Pt -XX Hex value port T.
Next test requested Pu -XX Hex value port U.
Next test requested P4 -XX Hex value port V.
Next test requested Puu -XX Hex value port W.
Next test requested A01XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A02XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A03XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A04XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A05XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A06XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A07XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A08XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A09XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A10XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A11XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A12XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A13XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A14XXXA/D port A/D value (non-
ratioed).0-255
Next test requested A15XXXA/D port A/D value (non-
ratioed).0-255
Next test requested PA0-XXHex value representing
state of A/D ports 0-7.
Next test requested PA1-XXHex value representing
state of A/D ports 0-7. Event Odometer Display Description of Test/Data Notes:

DI-44
WARNING CHIME
Revision: August 20072004 QX56
System DescriptionEKS007EF
FUNCTION
Power is supplied at all times

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70, and

through 10A fuse [No. 19, located in the fuse block (J/B)]

to key switch and key lock solenoid terminal 3.
With ignition switch in ON or START position, power is supplied

through 10A fuse [No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to BCM terminal 67

through body grounds M57, M61, and M79.
NOTE:
When ignition key warning chime, light warning chime, and seat belt warning chime are required at the same
time, the priorities for each chime are the following.
1. Light warning chime
2. Ignition key warning chime
3. Seat belt warning chime
IGNITION KEY WARNING CHIME
With the key inserted in the ignition switch, the ignition switch in OFF position, and the driver's door open, the
warning chime will sound.
Power is supplied

through key switch and key lock solenoid terminal 4

to BCM terminal 37.
Ground is supplied

to BCM terminal 47

through front door switch LH terminal 2.
Front door switch LH is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter via CAN
communication lines. When the combination meter receives key warning signal, it sounds warning chime.
LIGHT WARNING CHIME
With the key removed from the ignition switch, the driver's door open, and the lighting switch (part of the com-
bination switch) in 1st or 2nd position, the warning chime will sound. [Except when headlamp battery saver
control operates (5 minutes after ignition switch is turned to OFF or ACC position) and headlamps do not illu-
minate.]
Signal is supplied

from combination switch (lighting switch) terminals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10

to BCM terminals 2, 3, 4, 5, 6, 32, 33, 34, 35 and 36.
NOTE:
BCM detected lighting switch in 1st or 2nd position. Refer to BCS-3, "
COMBINATION SWITCH READING
FUNCTION" .
Ground is supplied

to BCM terminal 47

through front door switch LH terminal 2.
Front door switch LH is case grounded.
BCM detects headlamps are illuminated, and sends light warning signal to combination meter CAN communi-
cation lines. When the combination meter receives light warning signal, it sounds warning chime.
SEAT BELT WARNING CHIME
When the ignition switch is turned ON with the seat belt unfastened (seat belt buckle switch LH unfastened),
warning chime will sound for approximately 6 seconds.

WARNING CHIME
DI-45
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
Ground is supplied

to combination meter terminal 27

through seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) terminal 1.
Seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) terminal 2 is grounded through body
grounds B7 and B19.
The combination meter sends seat belt buckle switch LH unfastened signal to BCM via CAN communication
line.
BCM receives seat belt buckle switch LH unfastened signal from combination meter via CAN communication
line, and sends seat belt warning signal to the combination meter via CAN communication line. When the
combination meter receives the seat belt warning signal, it sounds the warning chime. The BCM controls the
(6 second) duration of the seat belt warning chime.
CAN Communication System DescriptionEKS007EG
Refer to LAN-5, "CAN COMMUNICATION" .

WARNING CHIME
DI-49
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
Terminals and Reference Value for Combination MeterEKS007EJ
How to Proceed With Trouble DiagnosisEKS007EK
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-44, "
System Description" .
3. Perform the preliminary check. Refer to DI-49, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS007EL
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-46, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 W CAN-H — — —
40 R CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
SKIA5292E
Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 W C A N - H — — —
12 R CAN-L — — —
27 O/B Seat belt buckle switch LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-52
WARNING CHIME
Revision: August 20072004 QX56
4. Touch "BUZZER" or “BCM”.
5. Select “DATA MONITOR”, “ACTIVE TEST” or “SELF-DIAG
RESULTS”.
DATA MONITOR
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch “ALL SIGNALS” or “SELECTION FROM MENU” on “DATA MONITOR″ screen.
4. If “SELECTION FROM MENU” is selected, touch the item you desire to monitor. If “ALL SIGNALS” is
selected, all control items are monitored.
5. Touch “START”.
6. During monitoring, touching “RECORD” can start recording the monitored item status.
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch the item to be tested, and check the operation.
4. During the operation check, touching “OFF” deactivates the operation.
Display Item List
SELF-DIAGNOSTIC RESULTS
Operation Procedure
1. Touch “BCM” on "SELECT TEST ITEM” screen.
2. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
3. Self-diagnostic results are displayed.
SKIA5788E
ALL SIGNALS Monitors main items.
SELECTION FROM MENU Selects and monitors items.
Monitored item Description
IGN ON SW Indicates [ON/OFF] condition of ignition switch.
KEY ON SW Indicates [ON/OFF] condition of key switch.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch (driver side).
TAIL LAMP SW Indicates [ON/OFF] condition of lighting switch.
BUCKLE SW Indicates [ON/OFF] condition of seat belt buckle switch LH.
Test item Malfunction is detected when···
LIGHT WARN ALMThis test is able to check light warning chime operation. Light warning chime sounds for 2 sec-
onds after touching “ON” on CONSULT-II screen.
IGN KEY WARN ALMThis test is able to check key warning chime operation. Key warning chime sounds for 2 seconds
after touching “ON” on CONSULT-II screen.
SEAT BELT WARN TESTThis test is able to check seat belt warning chime operation. Seat belt warning chime sounds for 2
seconds after touching “ON” on CONSULT-II screen.

WARNING CHIME
DI-53
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: August 20072004 QX56
Display Item List
All Warning Chimes Do Not OperateEKS007EN
1. CHECK BCM CHIME OPERATION
Select “BUZZER” on CONSULT-II, and perform “LIGHT WARN
ALM”, "IGN KEY WARN ALM", OR "SEAT BELT WARN" active test.
Does chime sound?
YES >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NO >> Replace the combination meter. Refer to DI-25,
"Removal and Installation of Combination Meter" .
Key Warning Chime and Light Warning Chime Do Not Operate (Seat Belt Warn-
ing Chime Does Operate)
EKS007EO
1. CHECK BCM INPUT SIGNAL
With CONSULT-II
1. Select "BCM" on CONSULT-II.
2. With "DATA MONITOR" of "BUZZER", confirm "DOOR SW-DR"
changes with the status of front door LH.
Without CONSULT-II
Check voltage between BCM harness connector M19 terminal 47
(SB) and ground.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NG >> GO TO 2.
Monitored Item CONSULT-II display Description
CAN communication CAN communication [U1000] Malfunction is detected in CAN communication.
CAN communication system CAN communication system 1 to 6 [U1000] Malfunction is detected in CAN system.
SKIA6331E
When front door LH is
opened: DOOR SW-DR ON
When front door LH is
closed: DOOR SW-DR OFF
LKIA0335E
When front door LH is
opened: Approx. 0V
When front door LH is
closed: Approx. 5V
WKIA1515E